List of top Physics Questions on Current electricity asked in MHT CET

Two cells of e.m.f. $E_1$ and $E_2$ ($E_1 > E_2$) are connected as shown in figure.

When a potentiometer is connected between points A and B the balancing length of potentiometer wire is $412$ cm. When same potentiometer wire is connected between points A and C the balancing length is $103$ cm. The ratio $E_1:E_2$ is

In meter bridge experiment, two resistances X and Y in the two gaps give a null point dividing the wire in the ratio $2:3$. When each resistance is increased by $30\,\Omega$, the null point divides the wire in the ratio $5:6$. The resistance X and Y are respectively

The resistances in the two gaps of a balanced meter bridge are 'X' $\Omega$ and '3X' $\Omega$ respectively. If the resistances are interchanged the balance point shifts by

In a meter bridge experiment, the balance point is obtained at length '$l_1$' cm from left hand when resistances in the left gap and right gap are $15 \Omega$ and $R \Omega$ respectively. When the resistance $R$ is shunted with equal resistance the new balance point is at $(1.6\,l_1)$. The resistance $R$ in ohm is

In a potentiometer circuit when two cells of e.m.f. $1.5$ volt and $1.2$ volt are connected to assist each other, balancing length is $270$ cm. What will be the balancing length in cm when these two cells are connected in opposition?

Resistances are joint as shown in the figure. In the balanced condition, the current $I$ drawn from the battery is

In the following network, the current flowing through $15 \Omega$ resistance is

In a metre bridge experiment the balance point is obtained if the gaps are closed by $2$ $\Omega$ and $3\Omega$. A shunt of $X$ $\Omega$ is added to $3$ $\Omega$ resistor to shift the balancing point by $22.5$ cm. The value of $X$ is

According to Ohm’s law: ____.

To convert a galvanometer into a voltmeter, one must connect a:

What is the shunt resistance $S$ needed if the galvanometer current $I_g$ is $8\%$ of the total current $I$?

Two stones of masses m and 3 m are whirled in horizontal circles, the heavier one in a radius $(\frac{r}{3})$ and lighter one in a radius r. The tangential speed of lighter stone is 'n' times the value of heavier stone. When the magnitude of centripetal force becomes equal the value of n is

Two batteries of e.m.f 4 V and 8 V with internal resistance 1$\Omega$ and 2$\Omega$ respectively are connected in series (opposing) with a 9$\Omega$ resistor. The current and potential difference between points 'P' and 'Q' is \dots

The potentiometer wire is 5 m long and potential difference of 4 V is maintained between the ends. The e.m.f. of the cell which balances against a length of 200 cm of the potentiometer wire is ______.

If the internal resistance of the cell is negligible, then the current flowing through the circuit is

In the circuit shown in the figure, $ P \neq R $. The reading of the galvanometer remains the same with switch $ S $ open or closed. Then

In the following circuit, current through ACB if each resistance $R=4\Omega$ is

A (2.5 V) battery is connected to a potentiometer wire. A cell of e.m.f. (1.08 V) is balanced by the voltage drop across (2.16 m) of wire. The length of the potentiometer wire is

During thermodynamic process, the increase in internal energy of a system is equal to the work done on the system. Which process does the system undergo?

Two sound waves travelling in the same direction have displacement $y_1 = a \sin(0.2\pi x - 50\pi t)$ and $y_2 = a \sin(0.15\pi x - 46\pi t)$. How many times, a listener can hear sound of maximum intensity in one second?

A polyatomic gas at pressure P, having volume 'V' expands isothermally to a volume '3 V' and then adiabatically to a volume '24 V'. The final pressure of gas is (for moderate temperature changes)

In metre-bridge experiment the balance point is obtained if the gaps are closed by $2 \Omega$ and $3 \Omega$. A shunt of $x \Omega$ is added to $3 \Omega$ resistor to shift the balance point by $22.5 \text{ cm}$. The value of $x$ is.

A (2.5 V) battery is connected to a potentiometer wire. A cell of e.m.f. (1.08 V) is balanced by the voltage drop across (2.16 m) of wire. The length of the potentiometer wire is

When a big drop of water is formed from ' $n$ ' small drops of water, the energy loss is ' $3E$ ' where ' $E$ ' is the energy of the bigger drop. The radius of the bigger drop is ' R ' and that of smaller drop is ' $r$ ' then the value of ' $n$ ' is

In Young's double slit interference experiment, using two coherent sources of different amplitudes, the intensity ratio between bright to dark fringes is $5 : 1$. The value of the ratio of resultant amplitudes of bright fringe to dark fringe is